Fluorine in Shark Teeth: Its Direct Atomic‐Resolution Imaging and Strengthening Function

What is it about?

Atomic structure of fluorapatite sampled from shark teeth enameloid was investigated using high-resolution transmission electron microscopy (TEM) and first-principles calculations. Imaging technique for the beam-sensitive material and the role of fluorine for teeth strengthen mechanism was discussed.

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Photo by David Clode on Unsplash

Photo by David Clode on Unsplash

Why is it important?

Atomic-resolution imaging of beam-sensitive biominerals is extremely challenging, owing to their fairly complex structures and the damage caused by electron irradiation. This work demonstrates that atomic-resolution observation of fluorapatite is possible by aberration-corrected electron microscopy with low-dose imaging techniques. Knowledge about the fluorine’s function for teeth strengthening will contribute to fundamental dental health research.